it must have rained last night,_____the ground is wet here and thereA because B as C since D for 为什么是d不选其他的呢?（例如since也可引出原因呀）
问题描述：
it must have rained last night,_____the ground is wet here and there
A because B as C since D for
为什么是d不选其他的呢?（例如since也可引出原因呀）
答